Climb, reach for the Heavens!

I spent a lot of time in winter trying to get ivy cuttings to grow but never had any success so I inevitably gave up. A couple of months ago though I found that the ivy at the back of my garden had "layered" itself, I think that's the term, and a vine was growing along the ground.
I took this vine and placed it against the fence. I felt really lucky because that's the exact position I wanted it to grow anyway. I checked on it days later and it had grown longer but not up the fence, it just kept crawling along. Eventually I made something akin to a staple out of metal and propped it up thinking it might need showing the way. It didn't listen though and instead I found a couple of days later a vine that had grown in an inverted U shape.
That vine was soon joined by friends and they all crawled along the border, reached the wall then turned around. There are at least 6 vines by the looks of it and they all have big leaves growing, but they aren't even trying to climb.
Is there anything I can do to encourage them up there?

 

I don't know much about ivy, but isn't it the case that some types of ivy don't really climb?

I'm sure I once read somewhere that some don't produce the sucker thingies that make them stick to things, so they just sort of ramble about the floor.

 

Thanks a lot, I'll just be a bit more patient then. They've started growing back the way they came lately so I'll turn them around tomorrow.

Well they came from an ivy plant that climbed over a 6 foot fence so I assumed it would do the same thing.